慢照射与茎尖培养相结合筛选甘薯同质突变体

Production of Homogeneous Mutants through the Use of Chronic Radiation in Combining with Shoot Apex Culture in Sweet Potato

甘薯品种玉丰、高系 14号和 Kandaba在生育期内用 6 0 Coγ射线慢照射 ,对照射后的材料进行茎尖组培 ,通过体细胞胚胎发生途径再生出大量植株。将这些再生植株移栽到大田 ,对辐照后代的形态特征和经济特性进行了调查和分析。结果表明 ,辐照后代 M1 V1 和 M1 V2 在顶叶形、叶形、顶叶色、叶脉色、脉基色、薯形及薯肉色、产量、干物率、食味、Brix等性状上发生了广泛的变异 ,并且这些变异是稳定的。获得了一批薯形、薯肉色、高产量、高干率和高

Sweet potato cultivars Tamayutaka, Kokei No.14 and Kandaba were planted in a gamma field. Shoot apices from the irradiated plants were cultured, and regenerated lots of plants via somatic embryogenesis. The regenerated plants were transplanted in a field. Variations of top leaf shape, leaf shape, top leaf color, leaf vein color, vein base color, root shape, root flesh color, root yield, dry matter content, taste after steaming, and root Brix were observed in progenies M 1V 1 and M 1V 2. The results indicated these variations were stably inherited. And the homogeneous mutants of root shape, root flesh color, high dry matter content, excellent taste, high root yield, and high root Brix were obtained.